Hi,
What is the return value of the lookup function under the
inode_operations struct ? I see that the function gets a dentry as a
parameter, which can be used to associate an inode. For example:
If we have:
struct dentry * somefs_lookup(struct inode *parent_inode,
struct dentry *child_dentry, unsigned int flags)
{
d_add(child_dentry, inode);
}
so, what is the meaning of the return "struct dentry" in this lookup
function ? In some simple filesystems that I saw, they return NULL
here and it seem to work just fine. So what is that the lookup
function should do if we are implementing our own filesystem ?
Thanks.
--
Sankar P
http://psankar.blogspot.com
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